A white powdery material made by calcining bones, usually from cattle. Bone ash primarily contains calcium hydroxyapatite with small amounts of magnesium phosphate, calcium carbonate, and calcium fluoride. It is used as a polishing agent and as a flux in ceramics. Bone china can contain 25-50% bone ash. Bone ash has also been used as a pigment called bone white in grounds for silver point drawings.
Synonyms and Related Terms
bone earth; bone white (AAT); calcined bone
Hazards and Safety
Noncombustible. Inhalation of ingestion may cause slight problems.
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